Incubator for fish.



No; 680,838. Patented Aug. 20, I90! H. BUURGEUIS;

INCUBATDR FOR FISH.

(Application filed May 10, 1901.)

(No Model.)

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HENRY BOURGEOIS, OF TOUROUVRE, FRANCE.

INCUBATQR FOR FISH.

SPECIFIGATIQN forming part of Letters Patent No. 680,838, dated August20, 1901. Application filed May 10, 1901. Serial No. 59,702. (No model.)

T0 at whom it may concern:

Be it known that I, HENRY Boonenors, a citizen of the Republic ofFrance, and a resident of Tourouvre, in the department of Orne, France,have invented certain new and useful Improvements in Incubators forFish, (for which I have applied for a patent in France, No. 296,073,dated January 30, 1901,) of which the following is a full, clear, andexact specification.

My invention relates to an improved incubator for fish-eggs; and itconsists of a tank or casing provided with a movable grid formed ofglass rods upon which the eggs are placed, said glass rods being therequired distance apart, such that the fry when hatched will fall to thebottom of the tank. The tank or casing is also provided with a movablevertical plate, half of the area of said plate being suitably perforatedand is placed in the tank or casing aforesaid in such a position thatwhen eggs are placed upon the movable grid aforesaid the current orstream of water flowing through the tank or casing will be caused toflow among the eggs; but upon the fry being hatched the position of theperforated plate aforesaid is reversed, so that the current or stream ofwater will flow along the bottom of the tank or casing, so supplying thefry with a constant change of water.

For purposes of illustration I will now refer to the annexed drawings,in wl1ich- Figure 1 is a longitudinal section of my improved incubator;Fig. 2, a plan view of same; Fig. 3, a cross-section through line X Y,Fig. 2. Fig. 4 is a longitudinal section showing the grid removed andthe position of the movable vertical plate when the fry have beenhatched.

The tank or casing a is provided with a water-inlet b and an outlet oroverflow c.

The movable grid consists of a number of glass rods 6, being attached toa frame (Z in any suitable manner, the grid beingsupported upon theprojectionsfor the like.

The movable vertical plate g is carried in grooves or the like in thesides of the tank or casing a, about one-half of its area being providedwith suitable perforations h, as shown in Fig. 3.

Referring to Figs. 1, 2, and 3, the eggs are placed upon the grid, theplate 9 is placed in position, as shown, so that the perforated part isuppermost, and a constant supply of water is allowed to enter the tankor casing at the inlet 6. Now it will be seen that the stream or currentof water will be caused to flow in a direction as shown by the arrows inFig. 1, passingbetween the glass rods e, so circulating the eggs with aconstant change of water. Referring to Fig. 4,upon the fry beinghatchedthey will fall to the bottom of the tank. The grid is then removed andthe position of the plate 9 reversed, as shown, so causing the stream orcurrent of water to flowin a direc-- tion as shown by the arrows, thusgiving the fry a constant change of fresh water.

Having thus described myinvention, what I claim, and desire to secure byLetters Patent, is-- A fish-incubator consisting of a tank containing amovable grid, a movable vertical plate half the area of which isperforated and arranged so as to cause a flow of water, first throughthe grid, and then by reversing the movable vertical plate aforesaid, ina horizon tal direction, substantially as described and illustratedherein and for the purpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand this6th day of March, 1901.

HENRY BOURGEOIS. lVitnesses:

BENJAMIN CLARK, A. E. GEORGE.

